Convoy L21A SST40 CW flashlight review

Luminus SST40 CW LED
2300 lm output
129600 cd intensity
1 x 21700 Li-Ion battery

The Convoy L21A SST40 CW flashlight was released in 2019. It uses Luminus SST40 CW LED, SMO reflector and 1 x 21700 Li-Ion battery. The powerful emitter in this flashlight provides up to 2300 lm output, 129600 cd intensity, and a beam distance of 720 m.

Keen to discover if this Convoy flashlight lives up to the hype? Keep reading!

Table of Contents

  • Convoy L21A SST40 CW specifications
    • Body, materials, weight, colors
    • System, LED, lens, reflector
    • Performance, flux, intensity, throw
    • Software, user interface, modes
    • Features, battery, protections
  • Conclusion, pros and cons
  • Photos
  • Comparisons

The content of this article reflects our own experiences and viewpoints. We aim to offer insights on a topic, and we hope others find it helpful and motivating. Additionally, we make every effort to provide accurate and comprehensive coverage.

Convoy L21A SST40 CW / L21ASST40CW

The L21A SST40 CW flashlight offers a versatile lighting solution. This light has 4 modes of lighting. The memory function is a nice feature, the light will remember the last used mode.

Convoy L21A SST40 CW specifications

NameL21A SST40 CW
Rated 4 / 5 based on 1509 user votes.

This Convoy flashlight is compact and handheld.

Convoy L21A SST40 CW / 1

Body, materials, weight, colors

Weight360 g
Length169 mm
Head diameter64.5 mm
Materialaluminium alloy with HAIII hard-anodized finish

This 360 g flashlight might feel relatively heavy if held in hand. A smaller flashlight is easier to carry in a pocket, bag, or pouch. The aluminium body of the L21A SST40 CW has a reputation for being durable and strong. The HAIII process makes a hard and wear-resistant surface on the aluminum. The L21A SST40 CW flashlight is available in black.

Convoy L21A SST40 CW / 2

System, LED, lens, reflector

EmitterLuminus SST40 CW LED
Color temperature6500 K
LensAR coated glass
Switchmechanical rear, forward clicky

Luminus is a US-based LED manufacturer. In the lighting industry, it has gained recognition as reputable. Color temperature is used to quantify the color appearance of light sources. The L21A SST40 CW has a smooth reflector. It gives you a better hotspot, and it throws better. The AR coating is thin and applied to the lens surface. The L21A SST40 CW flashlight has multiple switch options. Mechanical switches are usually robust. The rear switch allows for quick and easy momentary or constant-on activation.

Convoy L21A SST40 CW / 3

Performance, flux, intensity, throw

Flux2300 lm
Intensity129600 cd
Throw720 m
CD/LM factor56.35

With 2300 lm, the L21A SST40 CW flashlight will offer a brighter and more powerful beam of light. 129600 cd represents an extremely high level of brightness for a flashlight. The throw is the distance in meters at which the flashlight produces a light intensity of 0.25 lux. The cd/lm factor is the candela-to-lumen ratio. It shows how concentrated a light source's output is.

Software, user interface, modes

Modes4 modes
Mode memoryyes
Ramping modeno

A flashlight's modes are different output settings or brightness levels. The flashlight has mode memory. It remembers the mode you were using when the light was last turned off.

Features, battery, protections

Battery1 x 21700 Li-Ion battery
Battery indicatorno
Charger portno
Thermal regulationyes

The Convoy L21A SST40 CW flashlight is powered by 1 x 21700 Li-Ion battery. The L21A SST40 CW cannot charge batteries. You may need an external charger to keep your battery going. This flashlight has built-in low voltage protection (LVP). It prevents damage from over-discharge. The built-in thermal control adjusts brightness output to prevent overheating. The "8" in the IPx8 rating means the highest level of protection.

Conclusion, pros and cons

This Convoy flashlight, like any other, has its strengths and weaknesses. Let's take a close look at both sides to understand this flashlight better. I share my thoughts on its standout features and the parts that might need improvement. Keep in mind, these are just my opinions, and you might have a different perspective.


  • aluminium body
  • AR coated lens
  • tactical switch
  • super bright
  • multiple modes
  • mode memory
  • low-voltage protection
  • thermal regulation
  • waterproof


  • cool light
  • no battery indicator
  • no built-in charger
  • no auxiliary LEDs
  • non-magnetic


Convoy L21A SST40 CW / L21ASST40CW photo 1.
Convoy L21A SST40 CW / L21ASST40CW photo 2.
Convoy L21A SST40 CW / L21ASST40CW photo 3.
Convoy L21A SST40 CW / L21ASST40CW photo 4.
Convoy L21A SST40 CW / L21ASST40CW


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Updated: April 23, 2024

David Hagon
I love bushcraft and flashlights. I find joy in mastering wilderness survival skills and exploring the realm of illuminating gadgets. Bushcraft isn't just fun, it's a learning journey. I form a strong bond with nature. It's more than a hobby, it enriches me in practical and spiritual ways.